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D3 - Interior Electrics Airbags, Sensors, climate modules, instrument clusters, switches etc

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  #1  
Old 2nd February 2018, 05:39 PM
tc4332 tc4332 is offline
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Default J255 Climatic Control Unit

Does anyone have an internal wiring diagram of J255?
Or does anyone have a faulty one that I can strip down?
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Ray at Wigan Pier
2004 A8 D3 3.0 TDI.
Ebony Pearl Black (with little bits of other colours and glitter), Auto dim mirrors
Added AMI, two Aux inputs and RSE output to TV Tuner, Dash camera, non OEM Tyre Pressure monitor, full Trups LED lights, Xenon HIDs in Dip headlights (by Trups), non OEM Reversing camera, swapped TV Tuner to a Hybrid, Puddle light projectors, DRL's (auto dim with sidelights) fitted in foglight grills. DAB radio with replaced Audi aerial.



In progress, Rear Seat Entertainment.
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  #2  
Old 8th February 2018, 09:27 AM
tc4332 tc4332 is offline
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J255 Climate Control
This is the unit at the front where you can set the required temperature etc.
I want to connect to the contacts of the "ON/OFF" switch.
A non working one will suit me so that I can get inside it and see where two wires can be connected.
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Ray at Wigan Pier
2004 A8 D3 3.0 TDI.
Ebony Pearl Black (with little bits of other colours and glitter), Auto dim mirrors
Added AMI, two Aux inputs and RSE output to TV Tuner, Dash camera, non OEM Tyre Pressure monitor, full Trups LED lights, Xenon HIDs in Dip headlights (by Trups), non OEM Reversing camera, swapped TV Tuner to a Hybrid, Puddle light projectors, DRL's (auto dim with sidelights) fitted in foglight grills. DAB radio with replaced Audi aerial.



In progress, Rear Seat Entertainment.
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  #3  
Old 8th February 2018, 09:48 AM
mattylondon mattylondon is offline
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What project are you planning Ray?

There's a unit on ebay for 22.50. Other than that give A8Parts a call
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Matt

2004 A8 3.7q, 1998 A4 2.8q, 1994 Coupe 2.8q SORN,
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  #4  
Old 8th February 2018, 10:09 AM
tc4332 tc4332 is offline
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Morning Matt.
I have been using the Webasto to warm up the cabin on cold mornings. I have not added the water pump and pipes to install the full system.
On cold days I head out in slippers etc., open the car, press and hold the "ON/OFF" switch on J255 until the temperatures display. This fires up the blowers and Webasto. I can then lock the car and go back indoors.
Twenty minutes later I can go out to a defrosted, warm and toasty A8.
Now the project. Dah! Dah!.
I have a remote control sender receiver pair. The Rx has a relay with normally open contacts that I would to connect electrically across the contacts of the J255 On/Off switch. If that could be done then I could remotely set the Webaso etc. going from the bedroom, have a wash and the car would be ready for me.
Total luxury at up to now no cost!!!!
If no one offers a J255 I was planning on trying A8 Parts.
I don't want to break into my working unit until I have a decent idea of the problems that may arise. Even a circuit diagram of the internals would help.
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Ray at Wigan Pier
2004 A8 D3 3.0 TDI.
Ebony Pearl Black (with little bits of other colours and glitter), Auto dim mirrors
Added AMI, two Aux inputs and RSE output to TV Tuner, Dash camera, non OEM Tyre Pressure monitor, full Trups LED lights, Xenon HIDs in Dip headlights (by Trups), non OEM Reversing camera, swapped TV Tuner to a Hybrid, Puddle light projectors, DRL's (auto dim with sidelights) fitted in foglight grills. DAB radio with replaced Audi aerial.



In progress, Rear Seat Entertainment.
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  #5  
Old 8th February 2018, 10:38 AM
mattylondon mattylondon is offline
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I see what you are planning to do Ray.

Would adding the T90 Telestart to the webasto do the same job, or do you need the pump and pipes for the full system?

T90 Telestart (4F0909509 + 4F0909507B) is connected to the Aux. control module and in turn J255 via CAN. OEM albeit more expensive.

http://allegro.pl/sterownik-pilot-we...162265331.html 65 but with a VW fob. <--- Now Sold, someone on here?
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Matt

2004 A8 3.7q, 1998 A4 2.8q, 1994 Coupe 2.8q SORN,

Last edited by mattylondon; 9th February 2018 at 10:04 AM. Reason: part numbers
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  #6  
Old 8th February 2018, 12:17 PM
tc4332 tc4332 is offline
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The days of being able to go out and buy whatever I wanted have gone.
The big effect of Gwen's illness is the loss of another income.
I have to watch the pennies!!!
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Ray at Wigan Pier
2004 A8 D3 3.0 TDI.
Ebony Pearl Black (with little bits of other colours and glitter), Auto dim mirrors
Added AMI, two Aux inputs and RSE output to TV Tuner, Dash camera, non OEM Tyre Pressure monitor, full Trups LED lights, Xenon HIDs in Dip headlights (by Trups), non OEM Reversing camera, swapped TV Tuner to a Hybrid, Puddle light projectors, DRL's (auto dim with sidelights) fitted in foglight grills. DAB radio with replaced Audi aerial.



In progress, Rear Seat Entertainment.
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  #7  
Old 8th February 2018, 01:19 PM
mattylondon mattylondon is offline
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Understandable Ray. Look after the pennies and the pounds will look after themselves. Let's hope you pick up a second J255 unit to investigate with. To note these do have component protection.
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Matt

2004 A8 3.7q, 1998 A4 2.8q, 1994 Coupe 2.8q SORN,
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  #8  
Old 8th February 2018, 02:06 PM
tc4332 tc4332 is offline
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Thanks for the heads up Matt.
I hadn't thought that CP would be involved, another silly expense if the unit is swapped out.
I was hoping that there would be a way of tapping in to the external wiring but of course with CAN BUS that is just wishful thinking. These cars are too technically complicated. Please bring back the days of just five basic circuits in cars.
__________________
Ray at Wigan Pier
2004 A8 D3 3.0 TDI.
Ebony Pearl Black (with little bits of other colours and glitter), Auto dim mirrors
Added AMI, two Aux inputs and RSE output to TV Tuner, Dash camera, non OEM Tyre Pressure monitor, full Trups LED lights, Xenon HIDs in Dip headlights (by Trups), non OEM Reversing camera, swapped TV Tuner to a Hybrid, Puddle light projectors, DRL's (auto dim with sidelights) fitted in foglight grills. DAB radio with replaced Audi aerial.



In progress, Rear Seat Entertainment.
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  #9  
Old 8th February 2018, 02:29 PM
mattylondon mattylondon is offline
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Location: Norwich & L'viv
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Yeah CP is another expense you don't need. CAN BUS is great. It's the outdated clunky firmware that age these cars.
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Matt

2004 A8 3.7q, 1998 A4 2.8q, 1994 Coupe 2.8q SORN,
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  #10  
Old 15th February 2018, 12:36 PM
tc4332 tc4332 is offline
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Thanks to a very generous forum member I now have my hands on a J255.
VAG/Audi Number 4E0 820 043 A
SW 4E0 910 043 A 030

The unit was manufactured by Behr-Hella Thermocontrol GmbH (BHTC) in Lippstadt, Germany. This is not far from the Annual meet in Germany. I spent nine years in the area during my Army service and did know a lot of people there. Unfortunately the electronic guys thereabouts have moved on to a better place (this is the problem with age, everyone passes). I'm still in contact with their family members but none of them work for BHTC so no possibility of sneaking information through the old boys net.

Still can't find a circuit diagram but on close scrutiny I have found two small pads on the printed circuit board that I could solder two wires to. The plastic case has enough space for my remote receiver.
There are a number of openings in the case that two thin wires could pass through. I think this would be the better way to do this mod because the receiver aerial could be placed in a better reception area within the car.
I am a bit wimpish at the moment, it's cold outside, so I'll leave working on the car until later.

Big thanks to my secret donor.
__________________
Ray at Wigan Pier
2004 A8 D3 3.0 TDI.
Ebony Pearl Black (with little bits of other colours and glitter), Auto dim mirrors
Added AMI, two Aux inputs and RSE output to TV Tuner, Dash camera, non OEM Tyre Pressure monitor, full Trups LED lights, Xenon HIDs in Dip headlights (by Trups), non OEM Reversing camera, swapped TV Tuner to a Hybrid, Puddle light projectors, DRL's (auto dim with sidelights) fitted in foglight grills. DAB radio with replaced Audi aerial.



In progress, Rear Seat Entertainment.
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